Saving mat file with prefix over loop

Question

adi kul 2019-12-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/494525-saving-mat-file-with-prefix-over-loop

回答： Walter Roberson 2019-12-4

采纳的回答： Walter Roberson

Hello,

Looking help in saving same .mat file with prefix over loop.

Facing error with following script:

clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
    baseFileName = file(k).name;
    fullFileName = fullfile(d, baseFileName);
    % my code here
    outputBaseFileName = sprintf('Edited_%s', baseFileName);
    outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
    save(outputFullFileName,'Variable_1','-append');
end

Error I am getting is:

Error using save
Unable to write file 'myPath\Edited_myFileName.mat'
No such file or directory.
Error in Untitled (line 29)
save(outputFullFileName,'Variable_1','-append');

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Stephane 2019-12-3

You can cerate a dummy text file where you want to save your files, then compare its path+name to the output of outputFullFileName

adi kul 2019-12-4

Thing is if I use fullFileName instead of outputFullFilename it indeed saves same file with added variable.

    % outputBaseFileName = sprintf('Edited_%s', baseFileName);
    % outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
    save(fullFileName,'Variable_1','-append');

I am not sure what's wrong in here. Here is the full code here:

clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
    baseFileName = file(k).name;
    fullFileName = fullfile(d, baseFileName);
    x=load(fullFileName)
    Variable_1=x.Variable_4./x.Varibale_5;
    outputBaseFileName = sprintf('Edited_%s', baseFileName);
    outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
    save(outputFullFileName,'Variable_1','-append');
end

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Answer 1

Walter Roberson 2019-12-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/494525-saving-mat-file-with-prefix-over-loop#answer_404638

clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
    baseFileName = file(k).name;
    fullFileName = fullfile(d, baseFileName);
    x=load(fullFileName)
    x.Variable_1 = x.Variable_4./x.Varibale_5;
    outputBaseFileName = sprintf('Edited_%s', baseFileName);
    outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
    save(outputFullFileName, '-struct', 'x');
end

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Answer 2

Ruger28 2019-12-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/494525-saving-mat-file-with-prefix-over-loop#answer_404450

编辑：Ruger28 2019-12-3

Your Edited .mat file does not exist, so you must create it. Check to see if it exists, if it does, append. If it does not, create it.

clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
    % my code here
    outputFullFileName = fullfile(file(k).folder,sprintf('Edited_%s', file(k).name));
    if exist(outputFullFileName,'file') % file exists
        save(outputFullFileName,'Variable_1','-append');
    else % file is new since you made it "edited", and needs created
        save(outputFullFileName,'Variable_1');
    end
end

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adi kul 2019-12-4

this creates Edited_ .mat file but with only Variable_1 in it. While I want to have all the other variables from oriniglal .mat file and apend with Variable_1

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